Amy's so sure that her husband, Joel, is deeply invested in their future together. After all, it's his dream of a family together that has them trying so hard to have a baby, despite a series of disappointments. It's this certainty that leaves Amy absolutely floored when she learns of Joel's affair with her best friend.

Heartbroken and horrified, Amy flees to a dilapidated cottage in a Yorkshire village, a place she'd bought with dreams of making it feel homey and warm. In the new village, she feels like a clear outsider, but a group of local women soon take her under their wing. They gather for a routine book club, they say. Before Amy knows it, these women are in her life, and in her home.

Amy wakes one night to find herself outside in the fields. Strange offerings seem to be left on her doorstep. And the surveillance camera she installs shows shapes creeping around her house in the night. Strangest of all, she suddenly finds she's pregnant. A pregnancy that feels like a cruel joke.

The book club is incredibly invested in Amy's pregnancy. And it might just be in Amy's mind, but the women's interest doesn't always seem safe. What do the women want with her? And what do they want with her baby?